单词 | oleum |
释义 | oleum|ˈəʊliːəm| Pl. oleums. [L., = ‘oil’.] An oily liquid which is produced by dissolving sulphur trioxide in concentrated sulphuric acid in the contact process and is used in sulphonation and nitration processes; fuming sulphuric acid.
1905Blount & Bloxam Chem. for Engineers & Manuf. (ed. 2) II. i. 23 Ordinary vitriol is still called in Germany English sulphuric acid, in contradistinction to the fuming acid or ‘oleum’. 1949P. W. Vittum tr. Fierz-David & Blangey's Fund. Proc. Dye Chem. 83 When sulfonation is done with oleum, usually only the SO3 is used up. 1954Thorpe's Dict. Appl. Chem. (ed. 4) XI. 296/1 (heading) Boiling-points of oleums. 1973Times 20 Jan. 3/1 It [sc. a tanker] was carrying a maximum load of 20 tons of oleum, a corrosive acid said to react violently when in contact with a small quantity of water. |

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